Cast Capture of Jingzhou by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) , causing you to take an extra turn after this one.
Activate Magar by paying ({1} magic symbol) ({B} magic symbol) ({R} magic symbol) , noting Capture of Jingzhou and putting it face down as a 3/3 creature.
Move to your next turn.
Deal combat damage to an opponent with the face down creature.
The face down creature triggers, causing you to cast a copy of Capture of Jingzhou without paying its mana cost.
Resolve the copy of Capture of Jingzhou, causing you to take an extra turn after this one.